const { resolve } = require('path')
const HtmlWebpackPlugin = require('html-webpack-plugin');

module.exports = {

    mode: "development",

    entry: {
        base: './src/base.js',
        login: './src/pages/login/index.js',
        users: './src/pages/users/index.js',
        userAdd: './src/pages/userAdd/index.js',
        userUpdate: './src/pages/userUpdate/index.js'
    },

    output: {
        path: resolve(__dirname, 'dist'),
        filename: "./js/[name].[hash:8].js",
        clean: true
    },

    plugins: [
        new HtmlWebpackPlugin({
            template: './src/pages/index/index.html',
            filename: "index.html",
            chunks: ['base'],
            inject: 'body'
        }),
        new HtmlWebpackPlugin({
            template: './src/pages/login/index.html',
            filename: "login1.html",
            chunks: ['base', 'login'],
            inject: 'body'
        }),
        new HtmlWebpackPlugin({
            template: './src/pages/users/index.html',
            filename: "users1.html",
            chunks: ['base', 'users'],
            inject: 'body'
        }),
        new HtmlWebpackPlugin({
            template: './src/pages/userAdd/index.html',
            filename: "userAdd.html",
            chunks: ['base', 'userAdd'],
            inject: 'body'
        }),
        new HtmlWebpackPlugin({
            template: './src/pages/userUpdate/index.html',
            filename: "userUpdate.html",
            chunks: ['base', 'userUpdate'],
            inject: 'body'
        })
    ],

    devServer: {
        port: 3000,
        open: true
    },

    module: {
        rules: [
            // 处理JS文件 ES6 => ES5
            {
                test: /\.js$/,
                exclude: /node_modules/, // 不进行处理的文件夹
                use: {
                    loader: 'babel-loader',
                    options: {
                        presets: [
                            [
                                '@babel/preset-env',
                                {
                                    useBuiltIns: 'usage', // 只打包使用的ES6新API的实现代码
                                    corejs: { version: 2 } // 指定core-js的版本号为2
                                }
                            ]
                        ]
                    }
                }
            },

            // 处理css文件
            {
                test: /\.css$/,  // 配置css文件的正则
                use: [
                    'style-loader', // js文件 => 页面的style标签
                    'css-loader'  // css文件 => js文件
                ]
            },

            // 处理art文件
            {
                test: /\.art$/,
                loader: "art-template-loader",
            },
        ]
    },

}